• Siphonic PVC pipe system

    Good afternoon We are making a stress analysis on a storm siphonic system with PVC 1120, and we found this article about modeling PVC on AutoPIPE: Model Plastic Pipe in AutoPIPE - PlantFLOW Files - AutoPIPE - Bentley Communities We think the simplest…
  • B31.3 Appendix S S301

    Has anyone ever made the S301 example of B31.3 2020 appendix S in SI units? The axial force results are quite different from the results of the standard, however the horizontal displacements are correct. The examples provided by the autopipe software…
  • Fluid Transients in AutoPIPE

    Hi all, it seems the fluid transient module in AutoPIPE works by calculating the differential pressure in each pipe leg and applying the resulting force in a single direction at the point which experiences the higher pressure first. If you're manually…
  • Modelling Branch Connection - Modified 2-Point Method

    Hi, I am using the following approach to model a branch connection and was wondering if this is appropriate. A 45 deg lateral is shown in the diagram for clarity (all segments are in the XY-plane) but I am proposing to be able to use this for any…
  • B31.3 2016 stress equations on tees are non-conservative?

    Saw this article that states the formulas for the bending stress in tee's can be non-conservative - does B31J need to used instead? Did the formulas change from 2014-2018? http://www.whatispiping.com/asme-b31-3-issue (pasted below) About Author…
  • Fitting dimensions to use with ASME B31J?

    I'm looking for at least nominal values for welding tee crotch thickness and crotch radius, along with reducer alpha angle and flat length for use in calculating SIF's per ASME B31J. Does anyone have a reference that provides these values? I'm looking…
  • Allowable Stress Difference in Tee Connections

    Hello, I am working on a model in v11.2 with the AUTOPIPE library, B31.3 Process Piping Code, B313-16 Material, A269-TP316L Pipe Material, & wall thickness is 2 mm. When I run the code stresses in thermal expansion, I am getting different values for…
  • Cumulative Damage

    How may the cumulative fatigue damage at each point in a piping system be calculated using AutoPIPE and B31.3 Equation 1d?
  • Allowable stesses on NS materials

    "Karl Johan Watne" wrote: Since SuperDuplex ASTM A790 Grade S32750 is not part of the material library AUTOB313, I have added this as a NS material and entered the material properties. For some reason AutoPIPE reports different allowable stresses for…
  • S_h with two Temp Conditions

    "Steven Perry" wrote: I have noticed that AutoPIPE will apply to all occasional cases the lower strength/higher temperature S_h from B31.3 when two temperature cases are defined even when the occasional cases use the lower temperature as the base case…
  • SIF

    "khodayar" wrote: hello, in a gas project,we are dealing with large bore pipes.in many cases the ratio of D/t is greater than 100.so the B31.3 SIFs are not valid. first I want to know if Auto pipe is a suitable software to dealing with this large bore…
  • B31.3 2014 - Include axial force option

    Since ASME B31.3 2012 Edition, stresses due to axial forces have been added to both Sustained and Displacement(Thermal) stresses formula's, does checking or unchecking this option change anything in the result?
  • Extracting (or separating) steel model out of AutoPIPE V8i Select back to STAAD

    Hello all, I have a unique situation and wonder if the software has a solution. We have a linked AutoPIPE V8i Select / STAAD PRO file. Sometime after the STAAD steel model was integrated in to the AutoPIPE model, the original STAAD model was lost. Is…
  • Swagelok fittings in AutoPIPE

    Hi, I'm needing to analyze a piping system to B31.3 using AutoPIPE. Tubing and Swagelok fittings are extensively used; in many cases there are only short runs of pipe between fittings. Does anyone have any tips on how to model Swagelok fittings in…
  • Bend forces in Autopipe

    Dear All, I am a University student, working with Autopipe for one of our project. I was asked one question during the project review that how does Autopipe calculates the bend forces (as we do not define the velocity or flow in the pipeline) ?? …
  • Warning message (W726-10: User SIF required at junction at point )

    Dear All, I am facing the problem with branch connection, as the main run is of dia. 400mm and two branch connections are of 150mm placed in opposite direction. I tried to specify the SIF's but still m not getting rid of this warning and doesnt autopipe…
  • Thrust/Anchor Block

    Dear, Can anyone suggest how a Thrust block is modeled in Autopipe?? I have approached for the same like as in CAESAR II i.e. changing property of the soil near anchor/thrust blocks but what is the correct method to model a thrust block in AutoPipe…